fix(ghostty): tmux tweaking and bg opacity

modules/darwin/home/programs/ghostty.nix

@@ -5,6 +5,7 @@
 
     settings = {
       theme = "dracula";
+      background-opacity = 0.75;
       command =
         "shell:${config.home.profileDirectory}/bin/tmux new-session -A -s ghostty";
       keybind = [ "cmd+k=text:\\x01K" ];

modules/home/rsydn/shell/tmux.nix

@@ -22,8 +22,8 @@
       set-option -g default-terminal "screen-256color"
       set-option -ga terminal-overrides ",*256col*:Tc"
       set-option -g focus-events on
-      set -s extended-keys on
-      set -as terminal-features 'xterm-ghostty:extkeys'
+      # Avoid CSI-u newline remapping that breaks Neovim pastes
+      set -as terminal-features 'xterm-ghostty:bpaste,clipboard,RGB'
       set-option -g status-style "bg=#282a36 fg=#f8f8f2"
         set -g status-interval 5
         setw -g automatic-rename on